.home {
  background-color: white; /* 背景色覆盖 */
  border:30px solid darkgreen;
  margin:15px;
}

.welcome {
  height: 328px;
  background: url(../assets/yay.jpg) no-repeat center 0;
  background-size: 388px 328px;
}

.error {
  color: darkred;
}
